Force applying tool



June 5, 1962 A. H. HABERSTUMP 3,037,208

FORCE APPLYING TOOL Filed July 8, 1959 4 l b 34 4/ I 17 J! jg v a I IN VEN TOR. //7'e bf/94 16 run/@977;

United States Patent 3,037,208 FORCE APPLYING TOOL Alfred H. Haberstump,Detroit, Mich., assignor to Haberstump-Harris, Inc., Detroit, Mich, acorporation of Michigan Filed July 8, 1959, Ser. No. 825,759 8 Claims.(Cl. 1220) This invention relates to force applying tools, andparticularly to a force applying tool in which the position of theclinching jaws may be changed.

The tool of the present invention is an improvement over thatillustrated in the patent to A. H. Haberstump, No. 2,767,401, issuedOctober .23, 1956, and assigned to the assignee of the presentinvention. A cylinder is provided in the extension of the supportinghandle containing the operating valve for controlling the flow of air toand from the cylinder. The forward end of the cylinder is closed by ahead which is retained against longitudinal movement by a locking rodwhich permits the angular adjustment of the head relative to thecylinder. The head supports a pair of rockable clamping jaws actuated bya wedge carried on a piston disposed within the cylinder. The outer endsof the jaws are moved toward and away from each other when the wedge isadvanced and retracted, respectively. A spring clip on the head entersslots at the end of the cylinder to lock the head in any one of aplurality of adjusted positions. In this manner, the jaws may operate inthe plane of the handle or at any angle to such plane.

Accordingly, the main objects of the invention are: to provide apressure applying tool having jaws which may be adjusted to operate indifferent planes relative to a plane through a gripping handle; toprovide a head in a cylinder on the end of a handle of a tool whichsupports force applying jaws actuated by a Wedge on a piston which maybe angularly adjusted to operate the jaws in planes at an angle to theplane through the handle; to provide an adjustable head on a cylinder atthe end of the handle of a force applying tool which has a springlatching element thereon which may be engaged in one of a plurality ofslots in the end of the cylinder for locking the head in a desiredposition so that the jaws will operate in a plane through the handle orat a desired angle relative thereto, and, in general, to provide a forceapplying tool which is simple in construction, positive in operation,and economical of manufacture.

Other objects and features of novelty of the invention will bespecifically pointed out or will become apparent when referring, for abetter understanding of the inven tion, to the following descriptiontaken in conjunction with the accompanying drawing, wherein:

FIGURE 1 is a sectional view, in elevation, of a force applying toolembodying features of the present invention;

FIG. 2 is a sectional view of the structure illustrated in FIG. 1, takenon the line 22 thereof, and

FIG. 3 is a broken view of the structure illustrated in FIG. 1, with thelocking spring in unlatched position.

The tool embodies a frame 10 having a handle portion 11 and a cylinderportion 12 in unit relation with each other. A head 13 seals the rearopen end of the cylinder, being provided with a peripheral notch 14 inwhich an O-ring 15 is secured in sealed relation to the innercylindrical wall. The head is retained in position by a split ring 16which extends within a groove 17 in the inner wall of the cylinder nearthe end thereof. A threaded stop element 18 is secured in the head forlimiting the retractive movement of a piston 19 mounted within thecylinder. An O-ring 21 seals the stem of the threaded element 18 fromthe escape of fluid through the head.

3,037,208 Patented June 5, 1962 The piston 19 has an annular slot 22 inwhich an O-ring 23 is mounted for sealing the piston with the wall ofthe cylinder. A stem 24 extends forwardly from the piston 19, having onthe forward end a wedging element 25 containing a rear section 26 havingdiverging sides and a forward section 27 having sides of greaterdivergency. The sections having sides of different slope are providedfor a purpose which will be explained hereinafter.

The forward end of the cylinder 12 is closed by a head 28 which isretained within the cylinder by a square brass rod 29. The rod isdirected into a slot 31 through the Wall of the cylinder 12 and advancedinto the square opening formed by a slot 32 in the peripheral wall ofthe head 28 and a slot 33 in the inner wall of the cylinder. After thestraight rod has been advanced into the annular slot formed by the tworecesses, a right-angle end section 34 is inserted in an aperture 35within the head to prevent the rod from moving outwardly of the annularslots. The rod prevents the forward and rearward movement of the headwithin the cylinder but permits the angular adjustment thereoftherewithin.

The head supports spaced bosses 36 between which a pair of jaws 37 and38 are secured by a pivot 39. Clip supporting means. may be provided onthe forward end of the jaws, as illustrated in the above mentionedpatent, or other forms may be provided thereon for applying pressure toan element or device each time the tool is operated. The rearward endsof the jaws 37 and 38 have rollers 41 secured thereon by pivots 42, withthe forward end section 27 of the wedge 25 disposed therebetween. Itwill be noted from the relationship of the wedge with the rollers thatthe initial forward movement of the piston 19 causes the separation ofthe rollers 41 much more rapidly than when the sloping surfaces of therear section 26 are advanced therebetween. With this arrangement,greater force is applied near the end of the movement of the piston thanat the initial portion thereof. The jaw ends approach the element to beoperated on in a more rapid manner at the time the initial work is to beperformed thereon, followed by a slower movement of the jaws with agreater applied pressure.

The jaws may operate in the plane through the handle, as illustrated inFIG. 1, or may be disposed to operate in a plane at an angle to suchplane. The forward end of the cylinder 12 is provided with a pluralityof notches 43 in which a locking spring finger 44 may extend. When thefinger is disposed in a notch, as illustrated in FIGS. 1 and 2, the headis clamped against rotation to have the jaws operate in a desired plane.When the locking spring finger 44 is pushed forwardly and the head isturned, as illustrated in FIG. 3, the head may be adjusted to anyposition to have the jaws operate at right angles to the plane throughthe handle or at any angle in which the jaws may be locked when thelatching spring 44 is positioned within a notch. When the notches 43 areomitted, the frictional engagement of the spring 44 with the front endof the cylinder 12 retains the head in adjusted position. A spring 45returns the piston 19 to its rearmost position and the slight clearanceof the piston with the cylinders side walls permits the wedge and pistonto be turned with the head. The flat sides of the section 27 engaged bythe rollers and the sides of the wedge 25 engaged by the flat walls ofthe rectangular elements 46 disposed within the central portion of thehead assure the retention of this relationship in all positions ofadjustment of the head. A line contact always occurs between thesurfaces of the forward section 27 and the rearward section 26 with thesurface of the rollers 41.

Air for operating the tool is introduced through the connector 47 into apassageway 48 where it is trapped by a ball type valve 49 urged againstan O-ring seat 51 3 by a spring 52. The rearward movement of a plunger53 against the pressure of a spring 54 unseats the ball and permits theair to enter the chamber through a passageway 55. A pivoted trigger 56engages the plunger 53 to produce its operation.

The present invention permits the operator of the gun to have thepressure applied in a plane which is in the plane of the handle or atany desired angle relative thereto, to thereby eliminate the necessityof the operator turning his wrist in order to apply a force by the tool.With this arrangement, the force may be applied at any desired angle inthe plane or laterally of the plane of the handle. A simple adjustmentpermits the jaws which operate in a plane in which the force is appliedto be changed to operate in any other plane at the will of the operator.The rotation of the head within the cylinder rotates the bosses 36, thejaws 37 and 38, the piston 19 and the wedge 25 extending forwardlythereof. The cylinder is of substantial area so that the air admitted inthe rear end thereof produces a substantial force on the piston whenadvanced, which force is substantially augmented by the wedging actionoccurring between the rollers 41 and the wedge 25 when the latter isadvanced therebetween.

Upon the release of the trigger 56, the ball 49 seats against the O-ring51 and the air between the piston 19 and head 13 returns through thepassageway 55 and out through a passageway 57. The plunger 53 seals anorifice 53 when moved to ball unseating position, to thereby prevent theair from moving directly from the passageway 48 into the passageway 57.

What is claimed is:

1. In a force applying tool, a cylindrical body closed at one end, aclosure head secured at the other end of the body against longitudinalmovement while being mounted for rotation thereon, force applying meanscarried by said head, and means for releasably locking said head on saidbody after it is adjustably rotated.

2. In a force applying tool, a cylinder closed at one end and having apiston therein, a closure head at the other end of the cylinder securedagainst longitudinal movement thereon while being adjustable inrotation, releasable latching means for securing the head in rotatedadjusted position, and force applying means on said head actuated bysaid piston.

3. In a force applying tool, a handle, a cylinder having a closed end,said cylinder being mounted on one end of said handle, a piston in thecylinder, a closure head closing the other end of the cylinder whensecured against longitudinal movement thereon but adjustable inrotation, a force applying means on said head actuated by said piston,and releasable latching means for securing the head in a rotationaladjusted position.

4. In a force applying tool, a handle, a cylinder on said handle havinga closed end, a piston in said cylinder, a closure head secured on theopen end of said cylinder against longitudinal movement and forrotational adjustment thereon, force applying jaws carried by said headand pivoted together interjacent their ends, and wedge means on saidpiston extending between the jaws at one end thereof.

5. In a force applying tool, a handle, a cylinder on said handle havingan open end, a piston in said cylinder, a closure head secured to theopen end of said cylinder against longitudinal movement and forrotational adjustment thereon, force applying jaws carried by said headand pivoted together interjacent their ends, rollers on the jaws at oneend thereof, Wedge means on said piston extending between said rollersthe open end of said cylinder having spaced notches, and a fiat springlatch on said head engageable with one of said notches.

6. In a force applying tool, a handle, a cylinder on said handle havingan open end, a piston in said cylinder, a closure head secured to theopen end of said cylinder against longitudinal movement and forrotational adjustment thereon, force applying jaws carried by said headand pivoted together interjacent their ends, rollers on the jaws at oneend thereof, wedge means on said piston extending between said rollersand having two tapered sections, the forward section having a greatertaper than the rearward section.

7. In a force applying tool, a cylindrical body closed at one end, aclosure head secured at the other end of the body against longitudinalmovement while being mounted for rotation thereon, force applying meanscarried by said head, and means for frictionally securing said head onsaid body after it is adjustably rotated.

8. In a force applying tool, a handle, a cylinder on said handle havingan open end, a piston in said cylinder, a closure head secured to theopen end of said cylinder against longitudinal movement and forrotational adjustment thereon, force applying jaws carried by said headand pivoted together interjacent their ends, rollers on the jaws at oneend thereof, wedge means on said piston extending between said rollers,and a lock on said head securing said head in adjusted position.

References Cited in the file of this patent UNITED STATES PATENTS1,939,632 Randall Dec. 12, 1933 2,487,475 Powers Nov. 8, 1949 2,730,719Steiner Ian. 17, 1956 2,766,631 Van Sittert Oct. 16, 1956 2,767,401Haberstump Oct. 23, 1956 2,801,415 Jenny Aug. 6, 1957 2,887,686 WandelMay 26, 1959 2,968,042 Yankee Jan. 17, 1961

